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<a href="string__view_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &lt;string_view&gt;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceflow_1_1util.html">flow::util</a></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// Types.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="comment">/* Normally Basic_string_view would be forward-declared in a _fwd.hpp and defined here; instead it is defined here,</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="comment"> * and util_fwd.hpp simply `#include`s us.  This is in accordance with the list of known reasonable exceptions to</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment"> * the _fwd.hpp pattern; namely since our String_view et al = glorified alias for std::string_view et al. */</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span><span class="comment"></span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="comment">/**</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="comment"> * Essentially alias for a C++17-conforming string-view class template, which is a very lightweight `std::string`-like</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="comment"> * representation of a character sequence already in memory.  As of March 2022 the alias is formally to</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment"> * `std::basic_string_view` (unlike in the past, when that was not available -- until C++17).  However the alias remains</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment"> * to, at least, avoid breaking user code -- by providing the #String_view related alias.</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment"> * In addition this API-only subclass adds starts_with() and ends_with()</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment"> * which implement the common-sense C++20 `basic_string_view` operations `starts_with()` and `ends_width()`.</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment"> * These existed in the Boost `basic_string_view` that, pre-C++17, used to be the</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="comment"> * `String_view` alias target (when `Ch` is `char`).  The downgrade due to their lack of inclusion in C++17 (which</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="comment"> * inaugurated `*string_view` in C++ STL) is unfortunate; but these replacements are fine.</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="comment"> *</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment"> * @see #String_view, which is to `std::string_view` what the present template is to `std::basic_string_view`.</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span><span class="comment"> *      I.e., when working with `char` string sequences, which is typical, use #String_view.</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span><span class="comment"> *</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="comment"> * ### Rationale ###</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="comment"> * Why is this even a thing?  Why not use `std::basic_string_view` and `std::string_view` all over?</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment"> * Answer: It is mostly historic.  Flow was C++14 until ~3/2022.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment"> * `std::string_view` was added in C++17.  Before then, #String_view aliased to `boost::string_view`</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment"> * (another possibility would have been `boost::string_ref` -- same API -- long story), because it was available for</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment"> * C++14.  Now that we&#39;re on C++17, it&#39;s better to use the `std` thing, especially since many STL (and Boost, nowadays)</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="comment"> * APIs take `std::string_view` directly.  Hence the alias changed as planned all along.</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span><span class="comment"> *</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span><span class="comment"> * However the type alias remains.  Pragmatically: much code uses #String_view, even outside Flow, and there&#39;s no harm</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span><span class="comment"> * in an alias, particularly since we add the nice starts_with() and ends_with().  The alias was actively useful before;</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span><span class="comment"> * now removing it is a breaking change.</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="comment"> *</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span><span class="comment"> * ### Implementation/API note ###</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span><span class="comment"> * It would have been ideal to define the various constructors by simply inheriting all of `std::basic_string_view`</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span><span class="comment"> * ctors via the single statement `using Base::Base`.  However, at least with our gcc, it appears to cause some issue</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="comment"> * in propagating `constexpr`ness of these constructors (which is effectively used, at least, by the flow::log macros</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment"> * to make certain optimizations possible): compile errors.  To avoid this and various conversion issues, a number</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment"> * of constructors are explicitly (re)defined.</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span><span class="comment"> */</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits = std::<span class="keywordtype">char</span>_traits&lt;Ch&gt;&gt;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html">   67</a></span><span class="keyword">class </span><a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a> :</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>  <span class="keyword">public</span> std::basic_string_view&lt;Ch, Traits&gt;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>{</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>  <span class="comment">// Types.</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span><span class="comment"></span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span><span class="comment">  /// Short-hand for the base.  We add no data of our own in this subclass, just a handful of APIs.</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">   74</a></span><span class="comment"></span>  <span class="keyword">using </span><a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a> = std::basic_string_view&lt;Ch, Traits&gt;;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>  <span class="comment">// Ctors/destructor.</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span><span class="comment"></span> </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment">  /// Constructs null view: identical to #Base API.</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">   79</a></span><span class="comment"></span>  <span class="keyword">constexpr</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">Basic_string_view</a>() noexcept;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="comment"></span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span><span class="comment">   * Constructs view to string at given start location and length: identical to #Base API.</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span><span class="comment">   *        See #Base API.</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span><span class="comment">   * @param count</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span><span class="comment">   *        See #Base API.</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span><span class="comment">   */</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>  constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(Ch const * s, <span class="keywordtype">size_t</span> count);</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="comment"></span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span><span class="comment">   * Constructs view to given NUL-terminated string: identical to #Base API.</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span><span class="comment">   *        See #Base API.</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span><span class="comment">   */</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(Ch const * s);</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment"></span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span><span class="comment">   * Boring copy constructor: identical to #Base API.</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span><span class="comment">   *        See #Base API.</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span><span class="comment">   */</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#ac8b3bf9d62ecc27175e5ba3fd7438346">  102</a></span>  constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(const <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&amp; s) noexcept;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="comment"></span> </div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span><span class="comment">   * Identical to copy constructor but converts from a vanilla #Base.</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span><span class="comment">   *        See copy constructor.</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span><span class="comment">   */</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(<a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a> s);</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span><span class="comment"></span> </div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="comment">   * Constructs view directly into a `std::basic_string` (e.g., `std::string`).  `basic_string` has a conversion</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="comment">   * operator to `basic_string_view` but technically not to our slight embellishment thereof, Basic_string_view.</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span><span class="comment">   *        Self-explanatory.</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span><span class="comment">   */</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>  <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(const std::basic_string&lt;Ch, Traits&gt;&amp; s);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>  <span class="comment">// Methods.</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span><span class="comment"></span> </div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span><span class="comment">   * Boring copy assignment: identical to #Base API.</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span><span class="comment">   * @param s</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span><span class="comment">   *        See #Base API.</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span><span class="comment">   * @return See #Base API.</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span><span class="comment">   */</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a29622c65bafdae826514a625262b0fba">  127</a></span>  constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&amp; operator=(const <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&amp; s) noexcept;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="comment"></span> </div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span><span class="comment">   * Equivalent to C++20 `basic_string_view::starts_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span><span class="comment">   *</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span><span class="comment">   *        Possible prefix within `*this`.</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span><span class="comment">   * @return Whether `*this` contains `needle` as prefix.</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span><span class="comment">   */</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">starts_with</a>(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a> needle) const;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span><span class="comment"></span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span><span class="comment">   * Equivalent to C++20 `basic_string_view::starts_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span><span class="comment">   *</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span><span class="comment">   *        Possible prefix within `*this`.</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span><span class="comment">   * @return Whether `*this` contains `needle` as prefix.</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span><span class="comment">   */</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">starts_with</a>(Ch const * needle) const;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span><span class="comment"></span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span><span class="comment">   * Equivalent to C++20 `basic_string_view::starts_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span><span class="comment">   *</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span><span class="comment">   *        Possible prefix within `*this`.</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span><span class="comment">   * @return Whether `*this` contains `needle` as prefix.</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="comment">   */</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">starts_with</a>(Ch needle) const;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="comment"></span> </div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span><span class="comment">   * Equivalent to C++20 `basic_string_view::ends_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span><span class="comment">   *</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span><span class="comment">   *        Possible postfix within `*this`.</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span><span class="comment">   * @return Whether `*this` contains `needle` as postfix.</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span><span class="comment">   */</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">ends_with</a>(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a> needle) const;</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span><span class="comment"></span> </div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span><span class="comment">   * Equivalent to C++20 `basic_string_view::ends_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="comment">   *</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span><span class="comment">   *        Possible postfix within `*this`.</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="comment">   * @return Whether `*this` contains `needle` as postfix.</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="comment">   */</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">ends_with</a>(Ch const * needle) const;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span><span class="comment"></span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">  /**</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">   * Equivalent to C++20 `basic_string_view::ends_with()` which is lacking in C++17 but present in C++20 and</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span><span class="comment">   * previously-used-in-Flow Boost equivalent `string_view`.</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span><span class="comment">   *</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span><span class="comment">   * @param needle</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span><span class="comment">   *        Possible postfix within `*this`.</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span><span class="comment">   * @return Whether `*this` contains `needle` as postfix.</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span><span class="comment">   */</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>  <span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">ends_with</a>(Ch needle) const;</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>}; <span class="comment">// class Basic_string_view</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment"></span> </div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span><span class="comment">/// Commonly used `char`-based Basic_string_view.  See its doc header.</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"><a class="line" href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">  191</a></span><span class="comment"></span>using <a class="code hl_typedef" href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">String_view</a> = <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;<span class="keywordtype">char</span>&gt;;</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span> </div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span><span class="comment">// Template implementations.</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span> </div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>template&lt;typename Ch, typename Traits&gt;</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#aac9c25fae310c10ad497f5e2e81577ef">  196</a></span>constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;Ch, Traits&gt;::<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(Ch const * s, <span class="keywordtype">size_t</span> count) :</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>  <a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a>(s, count)</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>{</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>}</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span> </div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a8ef1d876e301dfbf11887bca023bc7ec">  203</a></span><span class="keyword">constexpr</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">Basic_string_view&lt;Ch, Traits&gt;::Basic_string_view</a>(Ch <span class="keyword">const</span> * s) :</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>  <a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a>(s)</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>{</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>}</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span> </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a1031f000ebbe035e7860f500fc763c27">  210</a></span><span class="keyword">constexpr</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">Basic_string_view&lt;Ch, Traits&gt;::Basic_string_view</a>(<a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a> s) :</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>  <a class="code hl_typedef" href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">Base</a>(s)</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>{</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>}</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a9a46031b242998fc356178152ed1c31a">  216</a></span><a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">Basic_string_view&lt;Ch, Traits&gt;::Basic_string_view</a>(<span class="keyword">const</span> std::basic_string&lt;Ch, Traits&gt;&amp; s) :</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>  <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(s.data(), s.size())</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>{</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>  <span class="comment">// That&#39;s it.</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>}</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span> </div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="keyword">constexpr</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">Basic_string_view&lt;Ch, Traits&gt;::Basic_string_view</a>() noexcept = default;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>template&lt;typename Ch, typename Traits&gt;</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;Ch, Traits&gt;::<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(const <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&amp;) noexcept = default;</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>template&lt;typename Ch, typename Traits&gt;</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>constexpr <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;Ch, Traits&gt;&amp; <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;Ch, Traits&gt;::operator=(const <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&amp; s) noexcept</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>  = default;</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span> </div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>template&lt;typename Ch, typename Traits&gt;</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">  231</a></span><span class="keywordtype">bool</span> <a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>&lt;Ch, Traits&gt;::starts_with(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a> needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>  <span class="keyword">const</span> <span class="keyword">auto</span> needle_sz = needle.size();</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>  <span class="keywordflow">if</span> (this-&gt;size() &lt; needle.size())</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>  {</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>  }</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != needle_sz; ++idx) <span class="comment">// needle_sz == 0 =&gt; no problem.</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>  {</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>    <span class="keywordflow">if</span> (!Traits::eq((*<span class="keyword">this</span>)[idx], needle[idx]))</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>    {</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>      <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>    }</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>  }</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span> </div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>}</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span> </div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#ae0846fbeb776ef1e083a041a7f816567">  251</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">Basic_string_view&lt;Ch, Traits&gt;::starts_with</a>(Ch <span class="keyword">const</span> * needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>  <span class="comment">/* Conceivably hand-writing it to avoid a Traits::length() search for NUL (in constructing the 2nd</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="comment">   * arg to starts_with() below) could improve perf; but on the other</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span><span class="comment">   * hand it could even slow it down in the haystack-too-small case; plus length() is likely to be</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span><span class="comment">   * assembly-optimized nicely.  Let&#39;s just not worry too much about it. */</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>  <span class="keywordflow">return</span> starts_with(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(needle));</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>}</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span> </div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a2cbc4a17df32bba3f48567c548589874">  261</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">Basic_string_view&lt;Ch, Traits&gt;::starts_with</a>(Ch needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>  <span class="keywordflow">return</span> (!this-&gt;empty()) &amp;&amp; (this-&gt;front() == needle);</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span>}</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span> </div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">  267</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">Basic_string_view&lt;Ch, Traits&gt;::ends_with</a>(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a> needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>  <span class="keyword">const</span> <span class="keyword">auto</span> needle_sz = needle.size();</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>  <span class="keywordflow">if</span> (this-&gt;size() &lt; needle.size())</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span>  {</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span>    <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>  }</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span>  <span class="keyword">const</span> <span class="keyword">auto</span> base_haystack_idx = this-&gt;size() - needle_sz;</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != needle_sz; ++idx) <span class="comment">// needle_sz == 0 =&gt; no problem.</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span>  {</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span>    <span class="keywordflow">if</span> (!Traits::eq((*<span class="keyword">this</span>)[base_haystack_idx + idx], needle[idx]))</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>    {</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>      <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>    }</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>  }</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>}</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span> </div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#ad13cc300b0ff56191de387d0f7136b9c">  288</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">Basic_string_view&lt;Ch, Traits&gt;::ends_with</a>(Ch <span class="keyword">const</span> * needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>  <span class="comment">// Same comment as in starts_with().</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span>  <span class="keywordflow">return</span> ends_with(<a class="code hl_class" href="classflow_1_1util_1_1Basic__string__view.html">Basic_string_view</a>(needle));</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>}</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span> </div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span><span class="keyword">template</span>&lt;<span class="keyword">typename</span> Ch, <span class="keyword">typename</span> Traits&gt;</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"><a class="line" href="classflow_1_1util_1_1Basic__string__view.html#aee1bcf58abe3b763a0cd15eb213fe458">  295</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">Basic_string_view&lt;Ch, Traits&gt;::ends_with</a>(Ch needle)<span class="keyword"> const</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span><span class="keyword"></span>{</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>  <span class="keywordflow">return</span> (!this-&gt;empty()) &amp;&amp; (this-&gt;back() == needle);</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span>}</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span> </div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>} <span class="comment">// namespace flow::util</span></div>
<div class="ttc" id="aclassflow_1_1util_1_1Basic__string__view_html"><div class="ttname"><a href="classflow_1_1util_1_1Basic__string__view.html">flow::util::Basic_string_view</a></div><div class="ttdoc">Essentially alias for a C++17-conforming string-view class template, which is a very lightweight std:...</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00067">string_view.hpp:69</a></div></div>
<div class="ttc" id="aclassflow_1_1util_1_1Basic__string__view_html_a546ac9c16e4ab24eab1259f077dbf719"><div class="ttname"><a href="classflow_1_1util_1_1Basic__string__view.html#a546ac9c16e4ab24eab1259f077dbf719">flow::util::Basic_string_view::ends_with</a></div><div class="ttdeci">bool ends_with(Basic_string_view needle) const</div><div class="ttdoc">Equivalent to C++20 basic_string_view::ends_with() which is lacking in C++17 but present in C++20 and...</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00267">string_view.hpp:267</a></div></div>
<div class="ttc" id="aclassflow_1_1util_1_1Basic__string__view_html_a9697dde34b975822a0f60e2c75c44f46"><div class="ttname"><a href="classflow_1_1util_1_1Basic__string__view.html#a9697dde34b975822a0f60e2c75c44f46">flow::util::Basic_string_view::Base</a></div><div class="ttdeci">std::basic_string_view&lt; Ch, Traits &gt; Base</div><div class="ttdoc">Short-hand for the base. We add no data of our own in this subclass, just a handful of APIs.</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00074">string_view.hpp:74</a></div></div>
<div class="ttc" id="aclassflow_1_1util_1_1Basic__string__view_html_aaabf738ac0b4248ebfd8c4ad90b71b77"><div class="ttname"><a href="classflow_1_1util_1_1Basic__string__view.html#aaabf738ac0b4248ebfd8c4ad90b71b77">flow::util::Basic_string_view::Basic_string_view</a></div><div class="ttdeci">constexpr Basic_string_view() noexcept</div><div class="ttdoc">Constructs null view: identical to Base API.</div></div>
<div class="ttc" id="aclassflow_1_1util_1_1Basic__string__view_html_afdb616000a65f5e65ee99ce7808153e8"><div class="ttname"><a href="classflow_1_1util_1_1Basic__string__view.html#afdb616000a65f5e65ee99ce7808153e8">flow::util::Basic_string_view::starts_with</a></div><div class="ttdeci">bool starts_with(Basic_string_view needle) const</div><div class="ttdoc">Equivalent to C++20 basic_string_view::starts_with() which is lacking in C++17 but present in C++20 a...</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00231">string_view.hpp:231</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html"><div class="ttname"><a href="namespaceflow_1_1util.html">flow::util</a></div><div class="ttdoc">Flow module containing miscellaneous general-use facilities that don't fit into any other Flow module...</div><div class="ttdef"><b>Definition:</b> <a href="basic__blob_8hpp_source.html#l00028">basic_blob.hpp:29</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_ae4dc52186797094b3040379ff19124c9"><div class="ttname"><a href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">flow::util::String_view</a></div><div class="ttdeci">Basic_string_view&lt; char &gt; String_view</div><div class="ttdoc">Commonly used char-based Basic_string_view. See its doc header.</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00191">string_view.hpp:191</a></div></div>
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